Oil burner apparatus



Dec. 5, 1933. c. K. $911.1. 0 9

OIL BURNER APPARATUS Filed July 22, 1950 2 Sheets-Sheet 1 FIG. 1

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("D Z2 o 24 f w INVENTOR COURTNEY K. SH/LL BY 5L4 Mme ATTORNEY Dec. 5, 1933. c. K. SHILL 1,938,089

OIL BURNER APPARATUS Filed' July 22, 1950' 2 Sheets-Sheet 2 L id FIG. 3 H

INVENTOR COURTNLTY K. \SHILL BY an.

ATTORNEY Patented Dec. 5, 1933 ES PATENT OFFICE UNITED STAT This invention relates to oil burner apparatus. In 011 burning apparatus a method of operation has been devised in which liquid fuel is sprayed into a duct simultaneously with the blasting of air therethrough. The atomized oil is carried along by the current of air, which thus becomes saturated with the oil vapor, after which, by some suitable means such as an-electric spark discharge, the inflammable mixture thus created is ignited. For the purpose of creating this flow of inflammable fluid, therefore, it is necessary to arrange, in proximityto the duct, a fluid pump for forcing liquid fuel'into 'the duct, and some means such as a blower for blasting air through the duct. 9

It is an object of the invention to provide, in a unitary casting or a member which is substantially integral throughout, a casing for a blower producing an air blast in a'duct of the type above 0 set forth and a support for a fluid pump to effect flow of liquid fuel into said duct. In addition thereto, a support, likewise an integral part of the casting, is provided to carry a motor which is so arranged as to serve as a single power source for both the blower and the liquid pump. In a preferred arrangement,the motor, the blower, and the pump are arranged so that the shafts thereof may be positioned in alignment and direct drive from the motor shaft utilized for the pump and the blower. The duct leading away from the blower casing is preferably formed as a unitary portion of the casting. In the operation of oil burners, it has been found that the parts which require attention most frequently are the jet tube for atomizing the liquid fuel within the air blast duct, and the ignition devices used for initiating combustion of the fuel spray and the oil saturated air, whenever this becomes necessary. These parts are housed within the air blast duct and generally are substantially inaccessible except if the entire apparatus be dismantled. It-is an object of this invention to assemble the jet tube and the ignition devices in such fashion that by merely sepa'rating a coupling of the oil supply line and disengaging a single securing device, they may be removed from association with the air duct easily and at will. The jet tube and the ignition devices, after the separation of the coupling and the disengagement of the securing device, may

then be easily slipped out of their assembled relation with the blast duct; repairs may thereafter be made, or the several parts cleaned without any inconvenience.

Other objects of this invention will be apparent from the description of the apparatus, and from the drawings herewith, or will be specifically pointed out hereinafter.

The invention is not intended to be restrictedto the details of construction and arrangement of parts herein shown and described, as the same may be modified in various particulars without departing from the spirit andscope of the inven- -tion, one practical embodiment of which has been herein illustrated and described without attempting to show all the various forms and modifications in which the invention might be embodied.

On the drawings, in which is disclosed a preferred embodiment of apparatus for effecting the invention,

Fig. 1 is a plan view in perspective of oil burner apparatus embodying the invention, the oil pump being shown unbolted, and slightly separated, from the blower casing with which it is assembled.

Fig. 2 is a plan view of the unitary casting which comprises the blower casing and support for the motor and the fuel oilpump.

Fig. 3 is a bottom plan view of the cover plate for an opening in the air blast duct having the jet tube and electrodes assembled therewith in the manner of the invention.

The oil burner assembly 10 shown in the drawings is intended to be assembled with a hot water boiler or similar means to be heated, which is not shown, since it forms no part of the-invention. The assembly is seen to include a single unitary casting 12 in which are formed a blower casing 14, a blower duct 16 leading from said casing, a base 18 for a motor'20, and a base 22 for a fuel pump 24. As can readily be seen, casing 14, motor base 18 and pump base 22, the latter two being arranged on opposite sides of the easing for a purpose hereinafter-appearing, are in such alignment that the shaft of motor 20 may be extended into the casing to receive thereon the driven elements of the fan or the like of the blower therein housed, and then to extend out of the casing to act as, or to be directly coupled to, the driven shaft of pump 24.

The casting is made as above set forth so that the casting for the blower will be positioned between the motor base and the pump base, thus effecting, when the several parts are properly assembled on.- the casting, a degree of counterbalancing of the several elements which is highly desirable. A pair of straps 26 may be secured to base 18 at an edge thereof to support a control box 2'! for motor 20, if it be desired to assemble such unit in conjunction with the other parts of'the apparatus. The inlet for. the blower is generally, in the case of centrifugal blowers, at the side walls of the casing within which the fan rotates. At the openings generally provided in these walls some suitable guard means such as a wire screen 28 is arranged to prevent the entrance of undesired objects into the casing. Air inlets, located as described, cooperate with the motor and fuel pump located adjacentthereto, and substantially in alignment therewith. By such arrangement, the motor and the pump located in the immediate vicinity of a hot body such as the burning oil within the boiler, with which the apparatus is assembled, benefit from the movement of air toward the blower, the moving air cooling these elements.

The air blast duct 16 is, as above set forth, substantially an integral part of the casting with which the casing and the motor and pump supports are formed. The walls of the duct are formed with an opening 30, which, in a preferred manner of construction, is located at the upper surface of the duct. A cover plate 32, which may be a casting or otherwise made up, is adapted to cooperate with opening 30. The cover plate is slightly largerin its dimensions than the opening 30, and has a notch 34 cut in one side edge thereof which is adapted to be slipped around a stud bolt 36 anchored upon the outer surface of the duct. When the plate is thus assembled over the 'bolt, head 38 thereof will clamp the plate against the body of the duct and thus retain the plate and the parts associated therewith securely assembled with" the duct.

On the inner side of the plate, an elbow 40 is secured into an opening in the plate and is itself connected with the jet tube 42, the outer end of which is fitted with any suitable spray nozzle 44 for dispersing into a spray an oil stream fed thereto. Leading up to the elbow 40 on the outer side of the plate is another elbow 46 which is secured within the same opening as the elbow 40 so as to communicate therewith. Leading away from elbow 46 is the supply line 48 from fuel pump 24, necessary valves and fittings being interposed in the line, for controlling the flow of liquid fuel from the pump to nozzle 44. A union 50 of any particular construction is assembled as a part of the line between the elbow 46 and pump 24 so that, at will, the line may be broken at this point, for a purpose hereinafter appearing.

A pair of tubes 52, of insulating and heat resistant material, are supported fixedly in position relative to jet tube 42 by means of a clamp 54, which is .assembled upon the jet tube and engages the three tubes to retain them in rigidly assembled position. Within tubes 52 are the electrodes 56, which project from the tubes in proximity to nozzle 44, at which point the ends of the electrodes are spaced apart a suitable distance to form a gap therebetween. The other ends of the electrodes are connected to conductors 58 which are led out of the duct through insulated passages 60 to any suitable source of electrical energy such as that supplying the motor 20. Preferably a spark coil of any preferred'construction is made a part of the circuit of the electrodes, for well-known purposes.

The electrodes are thus supported in position relative to the spray nozzle together with which they are all rigidly retained upon the cover plate.

It can easily be seen that, by releasing the plate from-the engagement of the stud bolt 36 with the side faces of the notch 34 therein, the plate may be separated from the body of the air blast struction herein involved, and many widely different embodiments of the invention designed without departing from the scope of the invention, as defined in the accompanying claims, the matter set forth by the above description is intended merely as illustrative of an operative embodiment of the invention.

I claim: 1. A single unitary cast member comprising an air blast creating element casing, and platforms integral therewith for supporting an oil pump and motive means for the element and the pump of oil burner apparatus, the casing including a discharge duct integral with and extending'from the casing and providing a non-devious path for air from the element, the supports for the oil pump and the motive means extending from and being integral with the casing, the casing and its duct being positioned intermediately between the support for the pump and the support for the motive means, the duct having an opening intermediately and above its bottom, a closure for the opening, and means, assembled on the closure and adapted to be inserted into the duct when the closure is'applied to the opening, and including an oil jet tube secured to the closure and having a separable connection for an oil supply line, and a pair of electrodes secured to the oil jet tube for igniting oil discharged from the tube.

2. Asingle unitary cast member comprising an air blast creating element casing, and platforms integral therewith for supporting an oil pump and 'diately thereof and above the bottom of the duct,

a closure for the opening, and oil combustion elements assembled on the closure and adapted to be inserted into the duct when the closureis applied to the opening, the elements including an oil jet tube secured to the closure and having a separable connection for an oil supply line, and a pair of electrodes secured to the oil jet tube for igniting oil discharged from the tube.

3. A single unitary cast member comprising an air blast creating element casing,and platforms integral therewith for supporting an oil pump and motive means for the element and the pump of oil burner apparatus, the casing including an integral discharge duct for air discharged from the casing and extending directly away from the casing, the duct having an opening intermediately thereof and above the bottom of the duct, a closure for the opening, and oil combustion elements assembled on the closure and adapted to be inserted into the duct when the closure is applied to the opening, the elements including an oil jet tube secured to the closure and having a separable connection for an oil supply line, and a pair of electrodes secured to the oil jet tube for igniting oil discharged from the tube.

4. A single unitary cast member comprising an air blast creating element casing, and platforms integral therewith for supporting an oil pump and I members secured over the plate, electrodes for igniting motive means for the element and the pump of oil burner apparatus, the casing including an integral discharge duct for air discharged from the casing and extending directly away from the casing, the duct having an opening intermediately thereof and above the bottom of the duct, a closure for the opening, and oil combustion elements assembled on the closure and adapted to be inserted into the duct when the closure is applied to the opening, the elements including a device for igniting inflammable substance within the duct.

5. In oil burner construction, an horizontally disposed air blast duct, the duct having an opening intermediately thereof and above the bottom level of the duct, a closure for the opening, and oil combustion elements assembled on the closure and adapted to be inserted into the duct when the closure is applied to the opening so that the elements will be projected directly into the air path, the elements including an oil jet tube secured to the closure and having a separable connection for an oil supply line, a pair of clamp oil jet tube, and a pair of electrodes for igniting oil discharged from the tube,' the electrodes being retained fixedly associated with the jet tube by the clamp members.

6. In oil burner construction, an horizontally disposed and substantially unidirectional air blast duct, the duct having an opening in and above the bottom level of the duct, a closure for the opening retained in position relative thereto by a single retaining means, and oil combustion elements assembled on the closure and adapted to be inserted into the duct when the closure is applied to the opening, the elements including a device for introducing an inflammable substance into the duct and from the closure.

7. In oil burner apparatus, the combination with means for creating a flow of air and of liquid fuel for such apparatus, of 'a duct for conducting the air to a combustion chamber, the duct leading in substantially a continuous, non-angular line from the air flow creating means and having an opening in a top wall thereof beyond the air flow creating means, a'removable cover plate for the opening, a fuel supply device secured to the a pair of electrodes supported.

the fuel, and means for retaining the device and the electrodes in assembled relation.

8. In oil burner apparatus, the combination with means for creating a flow of air and of liquid fuel for such apparatus, of a duct for conducting theair to a combustion chamber, the duct leading from the air flow-creating means, the duct having no ofi-set portions therein and having an opening in a wall thereof between the air flow creating means and the chamber, a removable cover plate for the opening, a fuel supply device secured to the plate, electrodes for igniting the fuel, and means for retaining the device and the electrodes in assembled relation.

9. In oil burner apparatus, the combination with means for creating a flow of air and of liquid fuel for such apparatus, of a duct for conducting the air to a combustion chamber, the duct leading from the air flow creating means, the duct having no off-set portions therein and having an opening in a wall thereof beyond the air flow creating means, a removable cover plate for the opening, a fuel supply device secured to the plate, electrodes'for igniting the fuel, protector tubes for the electrodes, and means for securing the protector tubes to the device and for bracing all of them in assembled relation.

10. In oil burner apparatus, the combination with means forcreating a fuel for such apparatus, of a duct for conducting the air-to a combustion chamber, the duct leading from the air flow creating means; the duct having no off-set portions therein, and having an opening in a wall thereof between the air flow creating means and the chamber, a removable cover plate for the device secured in and extending through the plate, a separable connection for the extending end of the 'device, electrodes for igniting the fuel, conductors for the electrodes extending through the plate, protectortubes for the electrodes, and means for securing the protector flow of air and of liquid opening, a fuel supply 7 tubes to the device and for bracing all of them 1 in assembled relation.

COURTNEY K. SHILL. 

